检索结果-南通市图书馆

Nonlinear Control of Bioprocess Using Feedback Linearization, Backstepping, and Luenberger observers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Modern Nonlinear Theory and Application 2014年第4期3卷 150-162页

作者： Muhammad Rizwan S. Khan Robert N. K. Loh Department of Electrical and Computer Engineering Oakland University Rochester Michigan USA

This paper addresses the analysis, design, and application of observer-based nonlinear controls by combining feedback linearization (FBL) and backstepping (BS) techniques with Luenberger observers. Complete development of observer-based controls is presented for a bioprocess. Controllers using input-output feedback linearization and backstepping techniques are designed first, assuming that all states are available for feedback. Next, the construction of observer in the transformed domain is presented based on input-output feedback linearization. This approach is then extended to observer design based on backstepping approach using the error equation resulted from the backstepping design procedure. Simulation results demonstrating the effectiveness of the techniques developed are presented and compared.

关键词： Bioprocess Feedback Linearization Backstepping Luenberger observers Observer-Based Control

A Fault Isolation Method for Nonlinear Dynamic Systems Based on Monotonous observers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Fault Isolation Method for Nonlinear Dynamic Systems Based...

Virtual Coupling Trains Based on Multi-Agent System Under Communication Delay

作者： Boutaleb Dahhou Gilles Roux LAAS-CNRS (Laboratoire d’Analyse et d’Architecture des Systèmes-Centre National de la Recherche Scientifique)7 Avenue du Colonel Roche31077 Toulouse Cedex 4France

非线性动态系统的故障隔离问题越来越受到人们的重视。现有文献中的方法很少注意故障隔离的速度。然而,当故障隔离算法被用于容错控制系统时,故障隔离的速度是一个关键指标。这篇论文提出了一种新的非线性动态系统的故障隔方法。这个方... 详细信息

非线性动态系统的故障隔离问题越来越受到人们的重视。现有文献中的方法很少注意故障隔离的速度。然而,当故障隔离算法被用于容错控制系统时,故障隔离的速度是一个关键指标。这篇论文提出了一种新的非线性动态系统的故障隔方法。这个方法基于观测器误差的单调性特性。该方法适用于许多类型的非线性动态系统,而且故障隔离的速度很快。

关键词： Fault Detection and Isolation Nonlinear Dynamic Systems Parameter Intervals observers

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第6期33卷 1545-1554页

作者： Guodong QIN Xiangxi MENG Tao WEN Baigen CAI School of Automation and Intelligence Beijing Jiaotong University The Institute of System Research China Industrial Control Systems Cyber Emergency Response Team

With the rapid development of railway transportation, virtual coupling(VC) has become a popular research topic. VC can greatly reduce tracking distance and increase the line capacity. Under VC control, the train formation control not only considers the behavior and speed adjustment strategy of the leader train but also the communication delays between trains. The quality of data communication between trains is an important aspect of train tracking control. We consider a virtually coupled train set(VCTS) as a multi-agent system. The Luenberger observer is introduced to estimate the real-time state of the train, based on the estimation, the train control consistency protocol is designed to account for communication delays. The stability of the error system is proven by constructing a Lyapunov function. The consistency of the coordinated train control is verified through simulation.

关键词： Couplings Protocols Transportation observers Stability analysis Real-time systems Formation control Delays Multi-agent systems Lyapunov methods

Observer-based Iterative and Repetitive Learning Control for a Class of Nonlinear Systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2018年第5期5卷 990-998页

作者： Sheng Zhu Xuejie Wang Hong Liu the department of information and electrical engineering zhejiang university city collegeHangzhou 310015China

In this paper, both output-feedback iterative learning control(ILC) and repetitive learning control(RLC) schemes are proposed for trajectory tracking of nonlinear systems with state-dependent time-varying uncertainties. An iterative learning controller, together with a state observer and a fully-saturated learning mechanism, through Lyapunov-like synthesis, is designed to deal with time-varying parametric uncertainties. The estimations for outputs, instead of system outputs themselves, are applied to form the error equation, which helps to establish convergence of the system outputs to the desired ones. This method is then extended to repetitive learning controller design. The boundedness of all the signals in the closed-loop is guaranteed and asymptotic convergence of both the state estimation error and the tracking error is established in both cases of ILC and RLC. Numerical results are presented to verify the effectiveness of the proposed methods.

关键词： Iterative learning control (ILC) observers repetitive learning control (RLC) time-varying parametrization.

Robust Predictive Current Control of Induction Motors Based on Linear Extended State Observer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electrical Engineering 2021年第1期7卷 94-105页

作者： Yongchang Zhang Xing Wang Haitao Yang Boyue Zhang Jose Rodriguez Inverter Technologies Engineering Research Center of Beijing North China University of TechnologyBeijing 100144China School of Electrical and Electroric Engineering North China Electric Power UniversityBeijing 102206China College of Engineering Universidad Andres BelloSantiago 8370146Chile

Model predictive current control can achieve fast dynamic response and satisfactory steady-state performance for induction motor(IM)***,many motor parameters are required to implement the control ***,if the motor parameters used in the controller are not accurate,the performance may *** this paper,a new robust predictive current control is proposed to improve robustness against parameter *** proposed method employs an ultra-local model to replace the mathematical model of the ***,to improve the control performance,a linear extended state observer is developed for disturbance *** tests confirm that satisfactory tracking performance can still be obtained although the motor parameters may not be accurately set in the controller.

关键词： Induction motor drives current control predictive control observers robustness

Hysteretic Nonlinearity Observer Design Based on Kalman Filter for Piezo-actuated Flexible Beams with Control Applications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2014年第6期11卷 627-634页

作者： Teerawat Sangpet Suwat Kuntanapreeda Rüdiger Schmidt Department of Mechanical and Aerospace Engineering King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand Institute of General Mechanics RWTH Aachen University Aachen D-52056 Germany

Piezoelectric actuators fundamentally possess hysteresis behavior. Estimation of the hysteresis is usually demanded for enhancing the performance of piezo-actuated systems. This paper presents an observer-based scheme to estimate the hysteresis in piezo—actuated flexible beams. The observer is based on a nonlinearity observer method. The discrete-time Kalman-filter algorithm is adopted for determination of the observer gains. The major advantages of the presented scheme include ease of implementation and robustness to uncertainty of hysteresis parameters. Simulation results demonstrate that the observer is able to estimate the hysteresis efficiently and has better robustness compared to the previous scheme existing in the literature. The present scheme was also successfully applied to a real-life system. Moreover, a control application example is included to demonstrate the effectiveness of the scheme.

关键词： observers piezoelectric actuator Kalman filter hysteresis hysteresis compensation flexible beam

Formation Control for Nonlinear Multi-agent Systems with Linear Extended State Observer

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 171-179页

作者： Wen Qin Zhongxin Liu Zengqiang Chen College of Computer and Control Engineering Nankai University Tianjin Key Laboratory of Intelligent Robotics Nankai University College of Science Civil Aviation University of China

This paper investigates the formation control problem for nonlinear multi-agent systems with a virtual leader. A distributed formation control strategy based on linear extended state observer(LESO) is proposed under the hypothesis that velocity of the agent s neighbors could not be measured. Some sufficient conditions are established to ensure that the nonlinear multi-agent systems form a predefined formation with switching topology when the nonlinear function is known. Moreover, the tracking errors are bounded with external disturbance. Lastly,a numerical example with different scenarios is presented to demonstrate the validity of the obtained results.

关键词： observers Multi-agent systems Uncertainty Switches Topology

Distributed Force/Position Consensus Tracking of Networked Robotic Manipulators

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 180-186页

作者： Lijiao Wang Bin Meng Beijing Institute of Control Engineering Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control Engineering

In this paper, we address the tracking problem of distributed force/position for networked robotic manipulators in the presence of dynamic uncertainties. The end-effectors of the manipulators are in contact with flat compliant environment with uncertain stiffness and distance. The control objective is that the robotic followers track the convex hull spanned by the leaders under directed graphs. We propose a distributed adaptive force control scheme with an adaptive force observer to achieve the asymptotic force synchronization in constrained space, which also maintains a cascaded closed-loop structure separating the system into kinematic module and dynamic module. A decentralized stiffness updating law is also proposed to deal with the environment uncertainties. The convergence of tracking errors of force and position is proved using Lyapunov stability theory and input-output stability analysis tool. Finally,simulations are performed to show effectiveness of the theoretical approach.

关键词： Adaptive force observers Manipulators Robot kinematics Kinematics Uncertainty observers

Leader-follower Consensus of Upper-triangular Nonlinear Multi-agent Systems

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 210-217页

作者： Chenghui Zhang Le Chang Xianfu Zhang School of Control Science and Engineering Shandong University

This paper is concerned with the leader-follower consensus problem by using both state and output feedback for a class of nonlinear multi-agent systems. The agents considered here are all identical upper-triangular nonlinear systems which satisfy the Lipschitz growth condition. First, it is shown that the leader-follower consensus problem is equivalent to the control design problem of a high-dimensional multi-variable ***, by introducing an appropriate state transformation, the control design problem can be converted into the problem of finding a constant parameter, which can be obtained by solving the Lyapunov equation and estimating the nonlinear terms of the given system. At last, an example is given to verify effectiveness of the proposed consensus algorithms.

关键词： Multi-agent systems Protocols Topology observers Nonlinear systems